Effect of salicylic acid on some biomass and biochemical changes of drought-stressed wheat (triticum aestivum l. Var. Cham 6)‎ seedlings

Abstract EN

This study was carried out to examine the effect of salicylic acid on growth of winter wheat plants (Triticum aestivum L.

var.

Cham 6) under water stress conditions.

The experiment consisted of pre-treated grains with salicylic acid solution with concentration of (100ppm) via soaking for three hours and spray of the seedlings with salicylic acid at the level of (200ppm), and the plants were put under drought stress conditions at different levels (0.75FC, 0.50FC, 0.25FC).

Shoot and root biomass characteristics as well as some biochemical changes of shoot were studied.

Statistical analysis were accomplished for the gained results using the completely randomized design for all of the experiments with four replications for each treatment and mean treatments were compared using Least Significant Difference Test (L.S.D.) at the level of 0.05 to the characteristics of plants that have been registered in the greenhouse, and the level of 0.01 to the chemical characteristics of the plants which were done in the laboratory.

The plant treating with salicylic acid led to significant increases in the most of shoot and root biomass characteristics under water deficit stress conditions which were included fresh weight and water content of shoot, as well as dry root/dry shoots per plant and the relative growth rate of leaf, but the water content of root and dry weight of root and shoot were decreased compared with untreated plants.

Proline and salicylic acid content of shoot showed an increase in plants treated with salicylic acid under drought stress comparing with untreated plants.